ARRESTED BY NEW HAMPSHIRE'S COLD CASE UNIT. OUR ANDY HERSHBERGER WAS IN THE COURTROOM WHERE THE TRIAL WAS SUPPOSED TO GET UNDERWAY. THEY HOPED TO PICK A JURY THIS MORNING BUT IT APPEARS THAT FLEXION PROCESS WILL LAST UNTIL TOMORROW WHEN 12 JURORS AND FOUR ALTERNATES WILL BE SEATED. THE JURY WILL HEAR OPENING STATEMENTS TUESDAY IN THE TRIAL OF DAVID MCLEOD. IT HAS BEEN 24 YEARS SINCE PROSECUTORS SAY HE SET THE FIRE THAT KILLED A FAMILY OF FOUR IN A KEENE APARTMENT BUILDING. THEY DIED FROM SMOKE IN RELATION IN THE 1989 PLAYS. PERSECUTORS SAY HE WAS FIGHTING WITH HIS EX-GIRLFRIEND WHO LIVED IN THE BUILDING AT THE TIME THE FLAMES BROKE OUT. THE CASE WAS COLD FOR TWO DECADES UNTIL HE WAS ARRESTED IN CALIFORNIA ON FOUR COUNTS OF SECOND-DEGREE MURDER. PROSECUTORS SAY THE FIRE WAS INITIALLY RULED ACCIDENTAL A FURTHER INVESTIGATION DETERMINED IT TO BE ARSON. KEY TESTIMONY WILL BE DELIVERED BY STATE AND DEFENSE FIRE EXPERTS. PROSECUTORS SAY THERE IS PHYSICAL EVIDENCE TO SUPPORT THAT THE FIRE WAS INTENTIONALLY SET WELL MCLEOD'S -- WHILE MCLEOD'S LAWYERS WILL CHALLENGE THE SCIENCE. THEY ALSO CHALLENGE THE FINDING THAT WAS A SAY WAS BASED ON TESTIMONY FROM A WITNESS THAT SINCE DIED.